So how did he like it??
I just rode from the house on trails in my 'hood. Gravenhurst probably has more woodland trails right here in town than all the other Muskoka towns combined!

He loved it! The area that we rode had quite a bit of snow so it was quite the workout but the temps were ideal & with the dampness today there was quite a bit of moisture in the snow, so decent traction.

What's the orange hose running from the rear axle to the seat? Is the bike methane powered?

LOL...close! ...it can be dog powered! I use it anywhere I have to keep Blue safe, usually when I ride from home to nearby trailheads, around town rides, etc...he gives me quite a boost too...very fun!!!!!
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He loved it! The area that we rode had quite a bit of snow so it was quite the workout but the temps were ideal & with the dampness today there was quite a bit of moisture in the snow, so decent traction.

I find climbing on the fatbike (my 40lb beast anyway) comparable to skate skiing uphill, definitely gets the heart rate up! Now I can cheat though by having Blue help